109 lines
3 KiB
C
109 lines
3 KiB
C
|
/* $NetBSD: t_filedesc.c,v 1.5 2012/03/18 09:46:50 jruoho Exp $ */
|
||
|
|
|
||
|
|
/*-
|
||
|
|
* Copyright (c) 2010 The NetBSD Foundation, Inc.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
||
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
||
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/cdefs.h>
|
||
|
|
__RCSID("$NetBSD: t_filedesc.c,v 1.5 2012/03/18 09:46:50 jruoho Exp $");
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
|
||
|
|
#include <assert.h>
|
||
|
|
#include <atf-c.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <pthread.h>
|
||
|
|
|
||
|
|
#include <rump/rump.h>
|
||
|
|
#include <rump/rump_syscalls.h>
|
||
|
|
|
||
|
|
#include "../h_macros.h"
|
||
|
|
|
||
|
|
ATF_TC(getfilerace);
|
||
|
|
ATF_TC_HEAD(getfilerace, tc)
|
||
|
|
{
|
||
|
|
|
||
|
|
atf_tc_set_md_var(tc, "descr", "race between multithreaded proc. "
|
||
|
|
"fd_getfile() and fd_close() (PR kern/43694)");
|
||
|
|
}
|
||
|
|
|
||
|
|
static int fd;
|
||
|
|
static volatile bool quit;
|
||
|
|
|
||
|
|
static void *
|
||
|
|
wrkwrk(void *arg)
|
||
|
|
{
|
||
|
|
|
||
|
|
/* just something to cause fd_getfile() to be called */
|
||
|
|
while (!quit)
|
||
|
|
rump_sys_write(fd, &fd, sizeof(fd));
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* for me, 1000 triggers extremely seldom, 10k sometimes, 100k almost always */
|
||
|
|
#define DEFAULT_ITERATIONS 10000
|
||
|
|
|
||
|
|
ATF_TC_BODY(getfilerace, tc)
|
||
|
|
{
|
||
|
|
pthread_t pt;
|
||
|
|
int fd_wrk;
|
||
|
|
int i, iters;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Want a multiprocessor virtual kernel. A multiprocessor host
|
||
|
|
* probably helps too, but that's harder to do in software...
|
||
|
|
*/
|
||
|
|
setenv("RUMP_NCPU", "2", 1);
|
||
|
|
rump_init();
|
||
|
|
|
||
|
|
fd = fd_wrk = rump_sys_open("/dev/null", O_RDWR, 0);
|
||
|
|
if (fd == -1)
|
||
|
|
atf_tc_fail_errno("cannot open /dev/null");
|
||
|
|
|
||
|
|
if (atf_tc_has_config_var(tc, "iters"))
|
||
|
|
iters = atoi(atf_tc_get_config_var(tc, "iters"));
|
||
|
|
else
|
||
|
|
iters = DEFAULT_ITERATIONS;
|
||
|
|
|
||
|
|
pthread_create(&pt, NULL, wrkwrk, NULL);
|
||
|
|
for (i = 0; i < iters; i++) {
|
||
|
|
rump_sys_close(fd_wrk);
|
||
|
|
fd_wrk = rump_sys_open("/dev/null", O_RDWR, 0);
|
||
|
|
assert(fd == fd_wrk);
|
||
|
|
}
|
||
|
|
|
||
|
|
quit = true;
|
||
|
|
pthread_join(pt, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
ATF_TP_ADD_TCS(tp)
|
||
|
|
{
|
||
|
|
ATF_TP_ADD_TC(tp, getfilerace);
|
||
|
|
|
||
|
|
return atf_no_error();
|
||
|
|
}
|